Function declaration not created when using export { default as foo } from '/path/to/foo'

[AndrewLeedham]

• Version: 1.3.8
• Rollup Version: 2.34.2
• Node Version: 12.16.1
• Does it work with tsc: Yes

Reproduction

I created a minimal repro which shows the results from both rollup-plugin-ts and tsc.
https://repl.it/@AndrewLeedham56/rollup-plugin-ts-namespace-repro

Expected Behavior

The declaration file to have both a function and namespace type, like the tsc output here: https://repl.it/@AndrewLeedham56/rollup-plugin-ts-namespace-repro#dist/tsc/foo.d.ts

This seems to be caused by export { default as Foo } from './foo'; as compiling ./foo.ts directly works as expected (I also tried export * from './foo' but that worked fine): https://repl.it/@AndrewLeedham56/rollup-plugin-ts-namespace-repro#dist/rollup-foo/foo.d.ts

Actual Behavior

It only has the namespace: https://repl.it/@AndrewLeedham56/rollup-plugin-ts-namespace-repro#dist/rollup/index.d.ts

[wessberg]

Hey Andrew,

Sorry for the late reply! This was due to a problem where ModuleDeclarations/NamespaceDeclarations could sometimes not be traced correctly, so their bindings would be deconflicted by mistake, and then the function was tree-shaken away.

I've since fixed this problem and will release a new version on NPM shortly.
I hope you found a workaround in the meantime :-)